unable run kamon with kamon-play-24 and kaon-akka

[andrea...@gmail.com]

Hi,

I'm trying to setup my play 2.4 app with kamon to obtain tracing of play requests and actor messages.
My configuration is:

in plugins.sbt:
...
addSbtPlugin("io.kamon" % "aspectj-play-runner" % "0.1.3")
...

in build.sb:
...
scalaVersion := "2.11.7"
...
val kamonVersion = "0.5.2"

libraryDependencies ++= Seq(

"io.kamon" %% "kamon-core" % kamonVersion,

"io.kamon" %% "kamon-play-24" % kamonVersion,

"io.kamon" %% "kamon-akka" % kamonVersion,

"io.kamon" %% "kamon-log-reporter" % kamonVersion

)
...

in application.conf:
...
kamon.metric.filters {
akka-actor {
includes = ["application/user/**" ]
excludes = ["kamon/**" ]
}
}

When I do the aspects-runner:run command in sbt the system give me back the following stack trace:

java.lang.RuntimeException: Kamon has not been started yet. You must either explicitly call Kamon.start(...) or enable automatic startup by adding -Dkamon.auto-start=true to your JVM options.

If I add -Dkamon.auto-start=true to the previous command the system responds:

com.typesafe.config.ConfigException$IO: application.conf: java.io.IOException: resource not found on classpath: application.con

If I remove kamon-akka from build.sbt the system works fine but I don't see any actor tracing.

Can you give me some hints on how to resolve the problem?

Thanks a lot

Andrea

[Diego Parra]

Andrea,

sorry for the late response you can try: aspectj-runner:run -Dconfig.resource=whatever.conf

Cheers,

Diego

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[andrea...@gmail.com]

Hi Diego

if I use

aspectj-runner:run -Dconfig.resource=application.conf

I obtain the usual

java.lang.RuntimeException: Kamon has not been started yet. You must either explicitly call Kamon.start(...)

if I use

aspectj-runner:run -Dkamon.auto-start=true -Dconfig.resource=application.conf

the response is

com.typesafe.config.ConfigException$IO: application.conf: java.io.IOException: resource not found on classpath: application.con

if I use

aspectj-runner:run -Dkamon.auto-start=true -Dconfig.file=conf/application.conf

the response is

com.typesafe.config.ConfigException$Generic: You set more than one of config.file='conf/application.conf', config.url='null', config.resource='application.conf'; don't know which one to use!

Thanks a lot

Andrea

[Andrew Richards]

Hi,

I had this same problem. It happens when you add kmon-akka a play project (2.4 on 2.11.7 in my case). You can reproduce it from the kamon-play-example-2.4.x just  by adding kamon-akka.

I was able to get it to work using:

[myapp] $ aspectj-runner:run -Dconfig.file=conf/application.conf -Dkamon.auto-start=true

Using -Dconfig.resource didn't work. The classpath must be screwed up when the config is loaded.

*Note* if you run the following during a session (ie with out -Dconfig.file):

aspectj-runner:run -Dkamon.auto-start=true

it will stop working as something (sbt, play or aspectj-play-runner) sets the value for -Dconfig.resource) and you get the following message

com.typesafe.config.ConfigException$Generic: You set more than one of config.file='conf/application.conf', config.url='null', config.resource='application.conf'; don't know which one to use!

then you have to restart sbt for it to work again.

Cheers,

Andrew

[Diego Parra]

Hi Andrew,

this issue was fixed in https://github.com/kamon-io/Kamon/issues/248. Kamon 0.6.0 will come out soon we are working on some changes in the akka instrumentation that is more like a huge rewrite once these changes are done we will publish snapshots for people to try it out and make sure it works nice and then publish.